# StepFunctionsAction
<a name="API_StepFunctionsAction"></a>

Starts execution of a Step Functions state machine.

## Contents
<a name="API_StepFunctionsAction_Contents"></a>

 ** roleArn **   <a name="iot-Type-StepFunctionsAction-roleArn"></a>
The ARN of the role that grants IoT permission to start execution of a state machine ("Action":"states:StartExecution").  
Type: String  
Required: Yes

 ** stateMachineName **   <a name="iot-Type-StepFunctionsAction-stateMachineName"></a>
The name of the Step Functions state machine whose execution will be started.  
Type: String  
Required: Yes

 ** executionNamePrefix **   <a name="iot-Type-StepFunctionsAction-executionNamePrefix"></a>
(Optional) A name will be given to the state machine execution consisting of this prefix followed by a UUID. Step Functions automatically creates a unique name for each state machine execution if one is not provided.  
Type: String  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/iot-2015-05-28/StepFunctionsAction) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iot-2015-05-28/StepFunctionsAction) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iot-2015-05-28/StepFunctionsAction)